Peter Wirth may refer to:

• James Wirth (Peter Wirth, 1830–1871), German Catholic Religious Brother
• Peter Wirth (politician) (born 1961), member of the New Mexico Senate

• Big Seven (United States)
• Big Sexy Land
• Big Sheep Mountains
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• Big Shiny Tunes
• Big Shiny Tunes 1
• Big Shiny Tunes 10
• Big Shiny Tunes 11
• Big Shiny Tunes 2
• Big Shiny Tunes 3
• Big Shiny Tunes 4
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• Big Shiny Tunes 6
• Big Shiny Tunes 7
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• Big Shiny Tunes '80s
• Big Shiny Tunes 9
• Big Shiny Tunes (album)
• Big Ship
• Big Ship (Cardiacs album)
• Big Shit Poppin'
• Big Shit Poppin' (Do It)
• Big Shoals State Park
• Bigshot
• Big Shot (Billy Joel song)